/*
 *  Copyright 2009 The Apache Software Foundation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.mybatis.generator.codegen.mybatis3.xmlmapper.elements;

import org.mybatis.generator.api.IntrospectedColumn;
import org.mybatis.generator.api.dom.xml.Attribute;
import org.mybatis.generator.api.dom.xml.TextElement;
import org.mybatis.generator.api.dom.xml.XmlElement;
import org.mybatis.generator.codegen.mybatis3.MyBatis3FormattingUtilities;

/**
 * 
 * @author Jeff Butler
 * 
 */
public class ModelWhereClauseElementGenerator extends AbstractXmlElementGenerator {

	private boolean isForUpdateByModel;

	public ModelWhereClauseElementGenerator(boolean isForUpdateByCriteria) {
		super();
		this.isForUpdateByModel = isForUpdateByCriteria;
	}

	@Override
	public void addElements(XmlElement parentElement) {
		XmlElement answer = new XmlElement("sql"); //$NON-NLS-1$

		if (isForUpdateByModel) {
			answer.addAttribute(new Attribute("id", introspectedTable.getMyBatis3UpdateByModelWhereClauseId())); //$NON-NLS-1$
		} else {
			answer.addAttribute(new Attribute("id", introspectedTable.getModelWhereClauseId())); //$NON-NLS-1$
		}

		context.getCommentGenerator().addComment(answer);

		XmlElement whereElement = new XmlElement("where"); //$NON-NLS-1$
		answer.addElement(whereElement);

		
		StringBuilder sb = new StringBuilder();
		
		for (IntrospectedColumn introspectedColumn : introspectedTable
                .getNonBLOBColumns()) {

            
            XmlElement whereNotNullElement = new XmlElement("if"); //$NON-NLS-1$
            sb.setLength(0);
            sb.append(introspectedColumn.getJavaProperty());
            sb.append(" != null"); //$NON-NLS-1$
            whereNotNullElement.addAttribute(new Attribute(
                    "test", sb.toString())); //$NON-NLS-1$

            sb.setLength(0);
            sb.append(" and "); //$NON-NLS-1$
            sb.append(MyBatis3FormattingUtilities
                    .getEscapedColumnName(introspectedColumn));
            sb.append("=");
            sb.append("#{");
            sb.append(introspectedColumn.getJavaProperty());
            sb.append("}");
            //sb.append(',');
            whereNotNullElement.addElement(new TextElement(sb.toString()));
            
            whereElement.addElement(whereNotNullElement);
        }

		if (context.getPlugins().sqlMapCriteriaWhereClauseElementGenerated(answer, introspectedTable)) {
			parentElement.addElement(answer);
		}
	}
}
